W32.Bugbear.E@mm

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Discovered: April 24, 2004
Updated: April 24, 2004 2:15:18 AM
Systems Affected: Windows

W32.Bugbear.E@mm is a mass-mailing worm that sends itself to email addresses it gathers from certain files on the system using its own SMTP engine.

Discovered: April 24, 2004
Updated: April 24, 2004 2:15:18 AM
Systems Affected: Windows

W32.Bugbear.E@mm is a mass-mailing worm. When the worm is executed, it displays a fake error message. The title of the message box is "WinZip", and the text reads "bad CRC 23bb8d3a (should be 0be7841c)".

It creates the following files in the %System% directory:
[random filename].exe (43008 bytes): a copy of the worm
[random filename].dll (5632 bytes): a dll used to log keystrokes
[random filename].tmp (43246 bytes): a zip file containing the worm
[random filename].nls (3 bytes): a text file containing a number
Several other files with random names and .dll or .dat extensions. These files contain random data.

The worm creates the following registry entry so that it executes every time Windows starts:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\[random value] = %System%\[random value].exe

The worm terminates the following processes:
_AVP32.EXE
_AVPCC.EXE
_AVPM.EXE
ACKWIN32.EXE
ANTI-TROJAN.EXE
APVXDWIN.EXE
AUTODOWN.EXE
AVCONSOL.EXE
AVE32.EXE
AVGCTRL.EXE
AVKSERV.EXE
AVNT.EXE
AVP.EXE
AVP32.EXE
AVPCC.EXE
AVPDOS32.EXE
AVPM.EXE
AVPTC32.EXE
AVPUPD.EXE
AVSCHED32.EXE
AVWIN95.EXE
AVWUPD32.EXE
BLACKD.EXE
BLACKICE.EXE
CFIADMIN.EXE
CFIAUDIT.EXE
CFINET.EXE
CFINET32.EXE
CLAW95.EXE
CLAW95CF.EXE
CLEANER.EXE
CLEANER3.EXE
DVP95.EXE
DVP95_0.EXE
ECENGINE.EXE
ESAFE.EXE
ESPWATCH.EXE
F-AGNT95.EXE
F-PROT.EXE
F-PROT95.EXE
F-STOPW.EXE
FINDVIRU.EXE
FP-WIN.EXE
FPROT.EXE
FRW.EXE
IAMAPP.EXE
IAMSERV.EXE
IBMASN.EXE
IBMAVSP.EXE
ICLOAD95.EXE
ICLOADNT.EXE
ICMON.EXE
ICSUPP95.EXE
ICSUPPNT.EXE
IFACE.EXE
IOMON98.EXE
JEDI.EXE
LOCKDOWN2000.EXE
LOOKOUT.EXE
LUALL.EXE
MOOLIVE.EXE
MPFTRAY.EXE
N32SCANW.EXE
NAVAPW32.EXE
NAVLU32.EXE
NAVNT.EXE
NAVW32.EXE
NAVWNT.EXE
NISUM.EXE
NMAIN.EXE
NORMIST.EXE
NUPGRADE.EXE
NVC95.EXE
OUTPOST.EXE
PADMIN.EXE
PAVCL.EXE
PAVSCHED.EXE
PAVW.EXE
PCCWIN98.EXE
PCFWALLICON.EXE
PERSFW.EXE
RAV7.EXE
RAV7WIN.EXE
RESCUE.EXE
SAFEWEB.EXE
SCAN32.EXE
SCAN95.EXE
SCANPM.EXE
SCRSCAN.EXE
SERV95.EXE
SMC.EXE
SPHINX.EXE
SWEEP95.EXE
TBSCAN.EXE
TCA.EXE
TDS2-98.EXE
TDS2-NT.EXE
VET95.EXE
VETTRAY.EXE
VSCAN40.EXE
VSECOMR.EXE
VSHWIN32.EXE
VSSTAT.EXE
WEBSCANX.EXE
WFINDV32.EXE
ZONEALARM.EXE

The email message has the following properties:

The from address can be spoofed from an address taken from the system. If not, the from address may contain one of the following:

accounts adam adrian agency agree alan albert alex alexander alfred alice alicia alison alive allen ally andre andrea andreas andres andrew andy angela angelo anger anita ann anna anne another answer anthony anton antonio archives ask back balance bank base beach beatrice beauty becky bell bernard bernhard best bill blue bob body bonny book boris brain brandon brave brenda brent brian bridge brother bruce bruno calvin cards carina carlos carol caroline catherine center check chris christine christoph christopher cindy claude claudia colin collins company contact customerservice dan dana daniel daniela dark dave david debby denis denise dennis deny diana diane doctor dominic dominik don donna doug douglas dsmith e-gold earth ecommerce ed eduardo elizabeth ellen emmanuel eric erica erich erick erik erika ernst eva evan even felix fernand fill finance francisco franco frank franz fred frederic funds gabriele garry gary georg george gerald gerard gerhard gerry glenn gold gordon gray greg gregor gregory hans harald harbor harrison heinz helen helene helga helmut help helpdesk henrik henry herbert herman hermann hernan howard ian info ingrid irene irina iron isaac jack james jan jane janet janice janna janne jason jennifer jerome jerry jill jim jimmy job jody joe johan johann johannes john jon jonathan jorge jorgen jose josef joseph josh jsmith judge judy juerg juergen juhani julia julie julien julio justin karen karin karl kathleen kathryn kathy katri katrin katy kelly ken kendra kenneth kerry kevin kimberly kontakt krista kristin kristine kurt larry laura laurence lawrence lena leo leonardo leopold linda lisa lucia luck luis mad mail manuel marc marco marcus margareta margaretha marge margit maria marianna mariano marie marina mario marion mark market marketing markus martin mary mathias mati matt matthew matti maureen maurizio mauro melania melanie member metal michael michaela michel miguel mike molly monica nadine nancy netbank news nick nicola nicolas nicole nina norbert ole oliver pamela paolo patrice patricia patrick paul paulo pedro peter questions race rachel ralf ralph randy ray ricardo rich rick rita rob robbie robert roberto roger roland rolf roll ronald rsmith rubber rudolf russell ruth ryan sabina sabine sam sandra scott serg serge service sharon silver silvia simon smith sophie stan stefan stefano stephane stephen steve steven support susan sylvia ted terri terry thomas tim tina tobias todd tom tomas toni tony uwe vanessa vincent vladimir voice wagner walter wendy werner william wolfgang

The subject may be one of the following:

!!! WARNING !!!
;)
Announcement
Friendly
Fwd:
Greetings!
Greets!
Hello!
Hi!
I cannot forget you!
I love you!
I need photo!!!
Interesting...
Introduction
Is that your password?
Just a reminder
Lost & Found
Love
Me nude
New Contests
News
Old photos
Payment notices
Please Help...
Re:
Report
Sex pictures
Stats
Today Only
Warning!
You are fat!
Your Gift
[Fwd: look] ;-)
bad news
empty account
fantastic
good news!
history screen
hmm..
look
new reading
photo
photos
sexy
update
various
wow!

The body of the message is one of the following:

Pease open an attachment to see the message.
Please see Attachment
See the attached file
See the attached file for more info
Take a look to the attachment
please,read the attach file.
see attachment

The attachment name is constructed in the format [%s].zip or [%s].jpg[42 spaces].scr, where [%s] is a randomly chosen filename from the system.

If the attachment is a zip file, it contains a file whose name is of the form "[base filename][40-50 spaces].scr", where [base filename] is one of the following:

a000032.jpg
girls.jpg
image.jpg
love.jpg
message.txt
music.mp3
myphoto.jpg
news.doc
photo.jpg
pic.jpg
readme.txt
song.wav
video.avi
you.jpg

The worm may also create another e-mail with the following subject:
Hello!

which contains the following types of confidential information obtained from the system:
Cookies
Clipboard
Key logging data
text from window

and this e-mail will be sent to the author of the worm.